Question

June collects books. Last year she had 20 books in her collection. Now she has 30 books. What is the percent increase of her collection?

Answer 1

50%

Explanation:

Her collection increased by 10 books.

You want to find out what percent of 20 books is 10 books. To do this you divide 10 by 20. That should give you 0.5 and then you multiply by 100 to get a percent, giving you 50%.

Hope this helps! :)